<html xmlns:th="http://www.thymeleaf.org" xmlns:layout="http://www.ultraq.net.nz/web/thymeleaf/layout" layout:decorator="layout">
<head>
    <title>Spring boot demo</title>
</head>
<body>
<h2 layout:fragment="header">Home</h2>
<div layout:fragment="content" class="container">
    <p th:text="${message}">this is a message.</p>
</div>
</body>
</html>